Public Health Emergency Officer Newsletter - July Published July 7, 2022 By Lt. Col. Sky Wolf 90th Medical Group F.E. WARREN AIR FORCE BASE, Wyo. -- Currently, the United States accounts for over half of COVID-19 cases in the Americas, and about 16% of total Global cases. The BA.4 and BA.5 Omicron SARS-CoV-2 sub-variants are currently predominant (52.3%) in the United States. And, COVID-19 herd immunity does not appear attainable More stories can be found here in the complete edition of the newsletter.